They'll need to write great material for her to keep her interested. She's not a dingbat like Paltrow.

True; but the hopeful thing here is that Amy seemingly had a sincere interest in the character of Lois Lane, so unless they really take a huge nose dive in the quality of the character, I think we have a safe chance that she'll be interested in appearing as many DC films as we've seen from the likes of the some of the veteran X-Men cast members.